Engine running lean, stinky exhaust

Ok, I just rebult my 750 Holly, it works great. I had a buddy help with it and adjusted it correctly. Before I did that I had changed out my spark plug wires from 7mm to 8mm Taylors and the plugs were just changed. Since I changed the plug wires my car has that grey smokey = bad stink like to much fuel, the smell that makes your eyes burn. Oh, its a 340 4brl. My buddy thinks now that I have new wires I am not sending enough spark to the plugs - I have a electronic distributor and I think the stock silver box, he said if I change my coil to the MSD blaster two and buy the orange box it will send more voltage and burn the fuel better and get rid of the smoke.... Any thoughts about this